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Wilhelmramsayite Mineral Data
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General Wilhelmramsayite Information
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 Chemical Formula: |
Cu3FeS3•2(H2O) |
| Composition: |
Molecular Weight = 378.36 gm |
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Potassium 0.31 % K |
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Sodium 0.12 % Na |
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Thallium 0.54 % Tl |
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Iron 15.35 % Fe |
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Copper 48.87 % Cu |
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Hydrogen 1.05 % H |
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Sulfur 25.42 % S |
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Oxygen 8.33 % O |
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______ |
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100.00 % |
| Empirical Formula: |
Cu2.91Fe2+1.04S3K0.03Na0.02Tl0.01•1.97(H2O) |
| Environment: |
Occurs in the core zone of an ultra-agpaitic pegmatite generally of potassium feldspar�nepheline�sodalite�alkali amphibole-pyroxene composition. |
| IMA Status: |
Approved IMA 2004 (Dana # Added) |
| Locality: |
Koashva Mountain, Khibiny massif, Kola Peninsula, Russia. Link to MinDat.org Location Data. |
| Name Origin: |
Name for Wilhelm Ramsay, Finnish geologist who did the first detailed study of the Khibiny-Lovozero alkaline complexes. |
| Synonym: |
IMA2004-033 |
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Wilhelmramsayite Crystallography
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| Axial Ratios: |
a:b:c =0.7061:1:0.8079 |
| Cell Dimensions: |
a = 5.147, b = 7.289, c = 5.889, Z = 1; V = 220.93 Den(Calc)= 2.84 |
| Crystal System: |
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P mmm |
| X Ray Diffraction: |
By Intensity(I/Io): 3.104(1), 1.897(0.7), 1.828(0.5),2.292(0.5), 2.727(0.5), 4.21(0.4), 5.12(0.4), 3.69(0.3), |
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Physical Properties of Wilhelmramsayite
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| Cleavage: |
{001} Perfect |
| Color: |
Dark lead gray, Iron black. |
| Density: |
2.75 |
| Diaphaneity: |
Opaque |
| Fracture: |
Flexible - Flexible fragments. |
| Habit: |
Platy - Sheet forms (e.g. micas). |
| Habit: |
Tabular - Form dimensions are thin in one direction. |
| Hardness: |
2.5 - Finger Nail |
| Luster: |
Metallic |
| Magnetism: |
Weakly ferromagnetic |
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Optical Properties of Wilhelmramsayite
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| RL Anisotrophism: |
Weak with no internal reflections. |
| RL Bireflectance: |
Weakly bluish gray to gray with bluish tints. |
| RL Color: |
Bluish gray. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Wilhelmramsayite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
14.95 |
17.45 |
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| 470 nm |
13.70 |
16.35 |
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| 546 nm |
11.35 |
14.00 |
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| 589 nm |
10.00 |
12.55 |
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| 650 nm |
8.65 |
11.00 |
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| 700 nm |
8.00 |
9.80 |
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Calculated Relative Intensity Colors of Wilhelmramsayite in Air
Relative
Intensity |
0% |
90% |
100% |
180% |
270% |
360% |
450% |
540% |
630% |
720% |
810% |
880% |
| R1 |
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| R2 |
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Calculated Properties of Wilhelmramsayite
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| Electron Density: |
Bulk Density (Electron Density)=2.71 gm/cc
note: Specific Gravity of Wilhelmramsayite =2.84 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0052030927
Boson Index = 0.9947969073 |
| Photoelectric: |
PEWilhelmramsayite = 35.94 barns/electron
U=PEWilhelmramsayite x relectron= 97.50 barns/cc.
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| Radioactivity: |
GRapi = 4.28 (Gamma Ray American Petroleum Institute Units)
Concentration of Wilhelmramsayite per GRapi unit = 23.39 (%)
Estimated Radioactivity from Wilhelmramsayite  - barely detectable
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Wilhelmramsayite Classification
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| Dana Class: |
02.14.08.01 (02)Sulfides - Including Selenides and Tellurides |
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(02.14)(Hydroxyl or Hydrated) |
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(02.14.08)Dana Group |
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02.14.08.01 Wilhelmramsayite! Cu3FeS3•2(H2O) P mmm 2/m 2/m 2/m |
| Strunz Class: |
02.FD.40 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.F - Sulfides of Arsenic, Alkalies; Sulfides with Halide, Oxide, Hydroxide, H2O |
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02.FD -With O, OH, H2O |
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02.FD.40 Wilhelmramsayite! Cu3FeS3•2(H2O) P mmm 2/m 2/m 2/m |
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Other Wilhelmramsayite Information
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| References: |
NAME( AmMin, v94:407) PHYS. PROP.(AmMin, v94:407) OPTIC PROP.(AmMin, v94:407) |
| See Also: |
Links to other databases for Wilhelmramsayite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
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Print or Cut-and-Paste your Wilhelmramsayite Specimen Label here :
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Wilhelmramsayite
Cu3FeS3•2(H2O)
Dana No: 02.14.08.01 Strunz No: 02.FD.40
Locality:
Notes:
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